First read and observe the introductory information
and safety warnings
Please follow these points in order to prevent damage to your vehicle when driving through water, for example on flooded streets:

WARNING

NOTICE
Checklist
Technical dataVolkswagen Touran Owners Manual. Introduction
This chapter contains information on the following subjects:
→ An economic driving style
→ Driving in a way which will save fuel
Fuel economy, environmental impact and wear on the engine, brakes and tyres depend
largely on three factors:
Personal driving style.
...
Volkswagen Touran Service Manual. Aqua Premium Application Instructions for Water-Soluble Products
When working with water-soluble products, pretreat the base
surface very carefully and only with water-soluble products and
the recommended processing materials.
Base Surface
Pre-treatment of base surfaces:
...